This is from a blog post I saw at the excellent Grognardia blog and it refers to this blog post and the A&D DMG Appendix N of literature that inspired 1e AD&D.
Asimov, Isaac: Foundation Trilogy
Burroughs, Edgar Rice: Barsoom series
Carroll, Lewis: Alice's Adventures in Wonderland and Through the Looking Glass
Graves, Robert: Greek Myths
Harrison, Harry: Stainless Steel Rat series
Homer: Iliad and Odyssey
Howard, R.E: Conan and Kull stories
Leiber, Fritz: Fafhrd and Grey Mouser stories
Le Guin, Ursula: Wizard of Earthsea
Lewis, C.S. : Narnia series
Lovecraft, H.P: Cthulhu Mythos
Moorcock, Michael: Elric, Hawkmoon and Oswald Bastable series
Nesbit, E. : Five Children and It, Phoenix and the Carpet
Smith, E.E. (Doc): Lensman Series
Tolkein, J.R.R.: Hobbit, Lord of the Rings, Farmer Giles of Ham and Tom Bombadil
This isn't exclusively fantasy as I didn't just play fantasy RPG, Traveller was another big game for me in the early years of my roleplaying and I also got inspiration from the following films and TV series.
Adventures of Robin Hood - Errol Flynn swashbuckling against Basil Rathbone
Dr Who
Flash Gordon serials
Star Wars: A New Hope, Empire Strikes Back
Star Trek the original series
